In 19th century Nova Scotia, village midwife Jean Langille’s first love ended in a quiet scandal: her childhood sweetheart married to a man on the far side of the colony, Jean's reputation in tatters. Now, all she wants is to be left alone in her cottage by the shore, to do her work and try to forget she ever knew how to love at all. Then, a labouring woman appears in the salt marsh behind Jean’s home in the dead of night. Muirin is beautiful, enigmatic . . . and barely speaks a word of English, having come from away to marry the fisherman who lives up on the hill. As Jean picks apart the knot of Muirin's silence and the two women grow ever closer, Jean feels a growing unease. She suspects the marriage between Muirin and her husband Tobias may not be all it seems. When Jean’s own past comes calling in the form of an unexpected visitor, stirring up old rumours and drawing her relationship with Muirin into question, she finds herself caught up in a deadly foxhunt with a desperate man in search of a mysterious stolen treasure. Jean must brave the depths of her own heart to save the woman she loves and uncover what Tobias is hiding—a Pandora’s box containing a wave big enough to drown Jean and Muirin both.